To the maximum it can go till the bottom value of $350, not less, because the price of bitcoin started from the value around 350$ - 375$.
350$ is very less amount. I cant see its going anywhere below 400 Dollars either.
Maybe after halving, it can go to $200 , if it has a lot of pressure of selling all and buying none.
Not sure what makes you think we may fall back to $200 prices, but it will not happen just because people are selling the coins that they bought before the block halving. Sure, it will have some impact on the price, but people will only sell if they see the price has increased quite a bit. If the price falls back to todays price levels, people will simply wait again till the price goes up. They won't be dumping the price down that low.
The bitcoin rice will never go to $200 again for longer than a week. If it goes to $200, it is a dead coin.